Toyota Tundra 2005 Service - Repair - Maintenance page 668

24 Check for open and short circuit in harness and connector between pump mod-
ule and ECM.
Wire Harness Side:
Canister Connector
L4
Front View
RESULT:
Test Results
Between 9 V and 14 V
Between 0 V and 3 V
A
DIAGNOSTICS
PREPARATION:
(a) Turn the ignition switch to OFF.
(b) Disconnect the L4 canister connector.
(c) Turn the ignition switch to ON.
(d) On the hand−held tester, select the following menu
items:DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST
L4
/ VACUUM PUMP (ALONE).
(e) Turn the vacuum pump ON.
CHECK:
A23446
Measure the voltage between terminal 1 of the canister connec-
tor and the body ground.
A23508
Suspected Trouble Areas
Normal
Wire harness between ECM and vacuum pump
B
− ENGINE (1GR−FE)
Go to step 32.
DI−393
Proceed To
A
B